Are you a risk taker?
Ask yourself, in which case would you take the bet? how many times in a row, what should the ratio of win/loss situation be? would it be worth to take the risk?
Remember, life isn't about just one chance. Failures are feedback, learn from them, if you repeat and keep on trying you WILL succeed sooner or later.
I would even take the bet if it was 10/15 bucks and repeat 5 times…